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Out-of-plane spin-orbit torque in polycrystalline IrMn3 for field-free perpendicular magnetization switching
Other titles
Observation of out-of-plane spin-orbit torque in a polycrystalline Py/IrMn3 heterostructure [Published]
Citation
Md Rejaul Karim, Manna, S., Gupta, A. K., Mohan, J. R., Maharana, S. K., Vas, J. V., Bose, A., Gupta, S., Rawat, R. S., Asada, H., Fukuma, Y., & Medwal, R. (2024). Observation of out-of-plane spin-orbit torque in a polycrystalline Py/IrMn3 heterostructure. Physical Review B, 110, Article 245423. https://doi.org/10.1103/physrevb.110.245423
Author
Md Rejaul Karim
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Manna, Sourabh
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Gupta, Ayush K.
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Mohan, John Rex
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Maharana, Suman Kumar
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Vas, Joseph Vimal
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Bose, Arnab
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Gupta, Surbhi
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Asada, Hironori
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Fukuma, Yasuhiro
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Medwal, Rohit
Abstract
The generation of on-demand out-of-plane spin polarization (ðð§) promises an efficient field-free switching of perpendicular nanomagnet has been limited mostly in the single crystal materials. For a direct technological application, it is desired to have an out-of-plane spin current generation from polycrystalline sputtered films rather than expensive single crystalline films. Here, we report the observation of out-of-plane and in-plane torques generated by the Ėð§ and ËðĨ spin polarization in the polycrystalline antiferromagnet IrMn3/permalloy (Py) heterostructure. A comparatively high value of out-of-plane spin torque ratio of 0.024 has been observed with a large out-of-plane spin Hall conductivity of â2.82Ã104âĒ(â/2âĒð)âĒ(ÎĐâĒm)â1. Additionally, we have investigated the underline mechanism and the fundamental role of Ėð§ spins in the context of external field-free magnetization switching of a perpendicular magnetic anisotropy (PMA) material. Our findings provide a new perspective on generation and detection of out-of-plane spin polarization in antiferromagnet material and manipulate the magnetization for the development of the next generation high-density, low-power consumption, logic device applications.
Date Issued
2024
Publisher
American Physical Society
Journal
Physical Review B